Cylindrical brush assembly



May 12, 1959 D. M. MALONE CYLINDRICAL BRUSH ASSEMBLY Filed Sept. 16,1955 2 Sheets-Sheet 1 May 12, 1959 D. M. MALONE 2,885,705

v CYLINDRICAL BRUSH ASSEMBLY Filed Sept. 16, 1955 INVENTOR. Dan/wok MMum:

' M Ma, 6;... mall/s V 2 Sheets-Sheet 2 United States Patent CYLINDRICALBRUSH ASSEMBLY Dominick M. Malone, Watervliet Township, Berrien County,Mich.

Application September 16, 1955, Serial No. 534,828

1 Claim. (Cl. -179) This invention rel-ates in general to an assemblyfor a cylindrical brush and more particularly to a relatively largebrush assembly which utilizes a bristle-supporting.

core divided into hemicylindrical sections.

It is common practice to divide the core of large cylindrical brushesinto hemicylindrical sections and mount the bristles upon the core. Itis necessary that suitable mechanism be provided for securing the twosections of said core together, as well as upon the shaft which supportsand rotates the brush assembly. Such a mechanism must grip the sectionsfirmly to prevent slippage thereof during rotation of the brush, butmust be easy to remove when repairs are required.

Accordingly, a primary object of this invention is the provision ofmechanism for securing the hemicylindrical sections of a large,cylindrical brush in position with respect to each other and forsupporting the assembled of each other, are each comprised of a circularend plate 19 having a co-axial integral hub 21 extending from one sidethereof. Since, in this embodiment, the end members 17 and 18 areidentical, corresponding parts of the right end member 18 will carry thesame numeral as the related parts on the leftward end member 17 with theaddition of a suflix a. The inner, opposing faces 22 and 22a of the endplates 19 and 19a, respectively are provided with co-axial annular rings23 and 23:: adjacent their 'respective peripheries, which rings extendtoward each other. Each end member is provided with a co-axial shaftopening 24 and 24a through which the shaft 25 is slidably received.Suitable means, such as the key 26 and 26a are provided for securingeach said end member upon the shaft 25, in a substantially conventionalmanner.

brush upon a shaft for positive, non slip rotation therewith.

A further object of this invention is the provision of a mechanism, asaforesaid, which is light in weight, simple to assemble and which can beeasily disassembled to A plurality, here four, of impelling bars 27 areintegral with, radially disposed upon and equi-distantly spaced aboutthe faces of said end plates. The bars 27 extend radially from near saidshaft opening 24 to the annular ring .23 (Figure 2) and extend axiallyinwardly further than said annular ring 23. Both ends of the brush core14 are provided with a plurality, here four, of radially dis; posed barslots 28. Saild bar slots are equi-distantly spaced about the end ofsaid brush core and, of such size and shape as to snugly receive thefull extent of the.

permit rapid removal of the brush sections for repair.

Other objects and purposes of this invention will become apparent topersons familiar with this type of equipment upon reading the followingspecification and examining the accompanying drawings, in which:

. Figure 1 is a broken side elevation view of a cylindrical brushassembly embodying my invention, partially in central cross-section.

Figure 2 is an exploded fragment of Figure 1 shown in centralcross-section.

Figure 3 is a sectional view taken along the line III-III of Figure 1.

Figure 4 is :a broken side elevation view similar to Figure 1 showing amodification of the invention.

Figure 5 is an oblique view of the end portion of a hemicylindricalbrush section for use with the modification.

Figure 6 is an oblique view of an end member for use with the modifiedform of the invention.

In meeting the objects and purposes set forth above as well as othersrelated thereto, I provide a cylindrical brush assembly comprised of apair of matched hemicylindrical brush sect-ions engaged by and supportedupon a pair of end members which are in turn mounted upon and rotatablewith a shaft which extends through a coaxial opening in said brush.

For purposes of convenience in description, the terms left, right andderivatives thereof will have reference to the brush assembly asappearing in Figure l. The terms inner, outer and derivatives thereofwill have reference to the geometric center of the brush assembly andparts associated therewith.

Detailed construction As shown in Figures 1 and 3, the brush assembly 10includes a pair of matched, substantially identical hemiimpelling bars27 (Figure 2) when the end 29 of the core is abutting the inner face 22of the adjacent end plate 19. In this position of the end plate, theannular ring 23 snugly embraces the adjacent portion of the periphery ofthe brush core 14, thereby holding the brush sections 11' and 12 inoperating position with respect to each other. The bar slots 28preferably but not necessarily extend from the passageway 13 through tothe outer peripheryof the brush core 14. In the interest of greaterstrength and ease of assembly, two of the four slots at each end of thebrush core 14 are disposed at the junction of the brush sections asshown in Figure 2.

Operation As evident from the above description, the brush assembly 10is assembled by placing the end members 17 and 18 upon the shaft 25 sothat their inner faces 22 and 22a are facing each other, and theimpelling bars on each respective end member extend toward each other. Apair of cooperating brush sections 11 and 12 with the bristle tufts inplace are then placed in position between the end members 17 and 18 sothat said shaft 25 extends through the passageway 13 in the brush core14. The passageway is somewhat larger in diameter than the shaft 25 toprevent any interference therebetween, and to assure a proper union ofthe brush sections 11 and 12. The end members 17 and 18 are then movedtoward each other until their faces snugly engage the corresponding ends29 of the brush core 14. In this position of the end plates the bars 27will be snugly received into the bar slots 28 and the periphery of thecore adjacent its ends will be snugly embraced by the correspondingannular rings 23 and 23a. The brush assembly is now ready for operation.

When it becomes necessary to remove the brush sections 11 and 12 forrepairs, such as the replacement of one of the bristle tufts 16, the endmembers 17 and 18 Patented May 12, 1959 are slid apart upon the shaft 25so that brush sections can be easily removed. It will be observed thatsuch removal of the brush sections 11 and 12 does not require thedisengagement of the shaft 25 from its mountings as would be required ifthe end members 17 and 18 were secured to the brush sections and had tobe removed therewith.

Modification Figures 4, and 6 show a modified form of the brushconstruction which is particularly useful for commercial automobilewashing purposes. This modified form employs a pair of hemicylindricalbrush sections 30, 31 Which are provided as in the previously discussedembodiment with bristles and bristle receiving recesses (not shown). Thebrush sections 30 and 31 are similar to the brush sections in thepreviously described embodiment but in their assembled position therespective ends of each brush section are offset from the correspondingend on the other brush section. Thus, the ends of brush section 31 arepositioned leftwardly as appearing in Figure 4 of the corresponding endsof brush section 30.

End members 32 and 33 are similar to the end members previouslydescribed but are formed so that one half thereof is raised relative tothe other hand so that the end members can engage and maintain the brushsections in their longitudinally oflset relationship. Thus, raisedsemi-circular portions 34 and 35 are provided on opposite halves of theend members 32 and 33, respectively, to engage the ends of the brushsections and provided the desired offset mounting thereof. Semi-circularflanges 41 and 42 are formed on each half of the end members and extendinwardly to encircle the ends of the brush sections as in the previouslydisclosed embodiment.

The brush sections are each provided with a bar slot 37' intermediatethe circumferential ends thereof (Figure 5). A pair of impelling bars 39and 39a are integral with and radially disposed upon the faces of theend members. The impelling bar 39a is on the raised semi-circularportion of the end member and extends inwardly therefrom such that itsinward edge is flush with the flange formed on the end member. Theimpelling bar 39 extends inwardly of the flange as in the previouslydescribed embodiment. The impelling bars fit in the slots 37 in thebrush sections and the flanges encircle the brush sections as in thepreviously described embodiment.

Although, particular, preferred embodiments of my invention have beendescribed above for illustrative purposes, it will be understood .thatvariations or modifications thereof within the scope of such disclosureare fully contemplated unless specifically stated to the contrary in theappended claim.

Lclaimi A cylindrical brush assembly comprising: a shaft; a pair ofcircular end plates each having a co-axial, circular opening throughwhich said shaft extends, said plates having parallel opposing faces ofequal diameter; a coaxial, annular ring integral with, and extendingaway from, the said opposing. face of each plate adjacent to theperiphery thereof; a plurality of equidistant, radially disposed barsintegral '-with said opposing face of each plate, said bars extendingradially from near said opening to said ring and extending axially anduniformly from said face a. greater distance than said ring; a co-axialhub integral with each said plate remote from said face; means forpositively, yet. 'releasably, securing said hubs upon said. shaftbetween its ends; a pair of hemicylindrical brush sections arranged in acylinderhaving a co-ax'ial opening through which said shaft is freelyreceivable, and from which said shaft is radially spaced at all points,said brush sections being of. substantially the same radial thickness assaid bars, the axial ends of said cylinder being snugly receivablewithin said ring, said end plates being at the extreme axial ends ofsaid cylinder and providing the only support of said cylinder upon saidshaft; means defining a plurality of equi-distant, radially disposedslots in both ends of said cylinder and equal in number to the number ofbars-for snugly receiving the full extent of said bars, two 0f saidplurality of slots being disposed at the junctions of said sections, andall of said slots extendingfrom the radially inner surface to theradially outer surface of said cylinder References Cited in the file ofthis patent UNITED STATES PATENTS 1,826,432 Owen Oct. 6, 1931 1,871,007Raisch Aug. 9, 1932 2,372,933 Caldwell Apr. 3, 1945 FOREIGN PATENTS569,721 Germany Feb. 7, 1933 959,657 France Oct. 10, 1949

